From: Sage Weil <sage@newdream.net>
Date: Tue, 26 Jul 2011 18:26:41 +0000 (-0700)
Subject: ceph: only queue capsnap if caps are dirty
X-Git-Tag: v3.1-rc1~220^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e77dc3e9c061e50c67e2e1a604d0a370f40db298;p=pandora-kernel.git

ceph: only queue capsnap if caps are dirty

We used to go into this branch if i_wrbuffer_ref_head was non-zero.  This
was an ancient check from before we were careful about dealing with all
kinds of caps (and not just dirty pages).  It is cleaner to only queue a
capsnap if there is an actual dirty cap.  If we are racing with...
something...we will end up here with ci->i_wrbuffer_refs but no dirty
caps.

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
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